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WorksheetsBinocular Vision Assessment Instruments
Total questions: 25
Worksheet time: 13mins
What is stereopsis primarily defined as?
The ability to see colors accurately.
The ability to perceive depth based on retinal disparity.
The ability to focus on objects at different distances.
The ability to see clearly with one eye.
Stereoacuity is typically measured in which units?
Diopters
Millimeters
Seconds of arc (arcsec)
Prism diopters
Which type of stereogram presents patterns of random dots where the target is hidden within the noise, requiring true global stereopsis?
Contour Stereograms
Random Dot Stereograms (RDS)
Anaglyph Stereograms
Lenticular Stereograms
Which stereopsis test is need to be used with polaroid glasses?
Titmus Fly Stereotest
Frisby Stereotest
Lang Stereotest
TNO
A patient with excellent stereopsis would typically have a stereoacuity value that is:
Very high (e.g., 3000 arcsec)
Around 400 arcsec
Very low (e.g., 20 arcsec)
Not measurable
The Worth 4-Dot Test is used to assess a patient's type of binocular vision response, which includes:
Refractive error, astigmatism, and presbyopia.
Fusion, suppression, or diplopia.
Visual acuity, color vision, and contrast sensitivity.
Ocular motility, pupillary reflexes, and intraocular pressure.
In the Worth 4-Dot Test, if a patient sees only 2 or 3 lights, it indicates:
Fusion
Diplopia
Suppression
Anomalous Retinal Correspondence
If a patient sees 5 lights during the Worth 4-Dot Test, it indicates:
Fusion
Diplopia
Suppression
Normal binocular vision
What type of glasses are typically worn by the patient during the Worth 4-Dot Test?
Polarized glasses
Red/green glasses
Trial frame lenses
Pinhole glasses
A primary advantage of the Worth 4-Dot Test is that it is:
Quantitative and provides an angle of deviation.
Highly objective and automated.
Simple, quick, and provides clear information on fusion/suppression.
Not affected by color perception deficiencies.
The Bagolini Striated Lens Test is considered a "non-dissociating" test because:
It uses very strong prisms to separate images.
It allows relatively normal vision through the lenses, minimizing disruption.
It requires the patient to close one eye.
It is performed in a dark room.
What is a key purpose of the Bagolini Striated Lens Test?
To precisely measure the angle of strabismus.
To assess fusion, suppression, or anomalous retinal correspondence (ARC) under natural viewing.
To quantify fusional vergence amplitudes.
To diagnose amblyopia based on visual acuity.
In the Bagolini Striated Lens Test, if a patient with normal binocular vision views a point source of light, they should see:
Two separate, non-intersecting lines.
Only one line.
A perfect cross (two intersecting lines) through the light source.
Multiple scattered dots.
Which of the following conditions might be indicated if a patient sees a cross with the Bagolini lenses, but the light source is not at the intersection, or the lines are broken/offset?
True diplopia
Normal fusion
Anomalous Retinal Correspondence (ARC)
Monocular vision
A disadvantage of the Bagolini Striated Lens Test is that it:
Is highly quantitative.
Is objective and does not rely on patient report.
Can be complex to interpret, especially with ARC.
Significantly dissociates the eyes.
Which instrument is described as a large, sophisticated, and highly versatile tool for comprehensive diagnosis and treatment of strabismus?
Titmus Fly Stereotest
Worth 4-Dot Test
Bagolini Striated Lens Test
Synoptophore
The Synoptophore is capable of measuring ocular deviations (strabismus) in various positions of gaze, including:
Only at near distance.
Only at far distance.
At various distances and positions of gaze.
Only in primary gaze.
What kind of testing does the Synoptophore provide for binocular vision?
Only sensory testing.
Only motor testing.
Both sensory and motor testing.
Only refractive error measurement.
A major advantage of the Synoptophore is its ability to:
Be highly portable and inexpensive.
Provide precise objective and subjective measurements of ocular deviation.
Be used without any training.
Provide a non-dissociating assessment.
Which of the following is a disadvantage of the Synoptophore?
It is simple and quick to perform.
It is compact and easy to transport.
It is large, expensive, and requires a highly trained operator.
It provides a natural assessment of binocular vision.
If a clinician wants to assess a patient's ability to perceive depth using a random dot stereogram, which test would be most appropriate?
Titmus Fly Stereotest (specifically the Wirt circles)
Randot Stereotest
Lang Stereotest (I or II)
All of the above (as they include RDS components)
Which test would be the BEST choice for a quick, initial screening to determine if a patient is suppressing one eye?
Synoptophore
Bagolini Striated Lens Test
Worth 4-Dot Test
Titmus Fly Stereotest
A patient presents with a suspected eye turn. Which instrument would provide the most comprehensive and precise objective and subjective measurements of the deviation?
Amsler Grid
Worth 4-Dot Test
Synoptophore
Lang Stereotest
For a very young child who cannot wear glasses, but whose stereopsis needs to be assessed, which test would be a good choice?
Titmus Fly Stereotest
Randot Stereotest
Lang Stereotest
Worth 4-Dot Test
Choose the TRUE statement about the comparison between the Titmus Fly and TNO test.
Both tests need to be done with polaroid glasses
Titmus fly have monocular contours but not in TNO
Titmus fly is more accurate if compared to TNO test
Both tests provide retinal disparities ranging from 15 to 480 second of arc
